Photographs also fulfill with the principle of pictorial superiority and offer many opportunities to communicate our science. But often they need minor improvements as a modification of light, color management to emphasize certain parts, noise removal, etc. If you do not know how I can help you.
In addition , we often encounter with poor quality images: photographs, diagrams, graphs, tables, etc. that you can retouch or rebuild for better communication of its contents. Do not settle with bad images, you can always improve them!